EP2323825A2 - Procede de realisation d'un noyau comprenant une enveloppe contenant des produits granuleux et/ou pulverulents, dispositif et noyeau obtenu - Google Patents
Procede de realisation d'un noyau comprenant une enveloppe contenant des produits granuleux et/ou pulverulents, dispositif et noyeau obtenuInfo
- Publication number
- EP2323825A2 EP2323825A2 EP09766085A EP09766085A EP2323825A2 EP 2323825 A2 EP2323825 A2 EP 2323825A2 EP 09766085 A EP09766085 A EP 09766085A EP 09766085 A EP09766085 A EP 09766085A EP 2323825 A2 EP2323825 A2 EP 2323825A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- filling
- producing
- level
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 title 1
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 description 13
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3821—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process composed of particles enclosed in a bag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/54—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles made of powdered or granular material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/76—Cores
Definitions
- the present invention relates to a method of making a core comprising an envelope containing granular and / or powdery products and to a core obtained from said process.
- the core is made of a water-soluble material, for example from a sand agglomerate and a binder consisting of a polymerized formophenolic resin with a hardener such as a diisocyanate, in the presence of a catalyst such as an amine, preferably a liquid.
- the mixture of sand and binder is poured into a mold to be following cooked.
- This type of core is used in particular for the manufacture of composite material parts having an open cavity, the core being inserted between two parts until the polymerization. After the polymerization of the piece around the core, the latter is broken down by means of an organic solvent.
- the present invention aims to overcome the drawbacks of the prior art by providing a reproducible method of producing a core for controlling the dimensional characteristics of the part made using the core.
- the subject of the invention is a process for producing a core that can be used for the manufacture of a composite material part, said core consisting of at least one powdery and / or granular product, of introducing said at least one powdery and / or granular product by vibrating it in an outer envelope placed in a tool having a cavity delimited by a wall whose geometry is adapted to that of the core to be produced and to press said outer envelope against said wall, characterized in that vibrations are emitted slightly above the filling level during filling.
- FIG. 1 is a sectional view along the line I-I of Figure 2 of a mold for producing a core according to the invention.
- FIG. 2 is a side view of a device for carrying out the method according to the invention.
- the core has a constant section, for example trapezoidal, and extends in a longitudinal direction materialized by the axis 12.
- this core 10 can be used to manufacture a composite material part and be inserted between a panel and an Omega-shaped stiffener to ensure the geometry of the stiffener after polymerization.
- the geometry of the core the invention is not limited to this application.
- the core 10 comprises an outer envelope 14 containing a filling material 16 forming the core of the core.
- the outer envelope 14 is made of a flexible and waterproof material, for example silicone.
- the filling material 16 consists of at least one powdery and / or granular product.
- microbeads constitute the filling material 16.
- other materials may be envisaged.
- the core 10 is made from a tool 18 comprising a cavity delimited by a wall 20 whose geometry is adapted to that of the core to be produced.
- the mold 18 may comprise one or more parts, two parts according to the example illustrated in FIG.
- the method of the invention is characterized in that it consists in pressing the outer casing 14 against the wall 20 of the tool cavity and then inserting in said casing the filling material 16 by vibrating it.
- Plating the outer casing 14 makes it possible to control the external forms of the core (section and length) and to reproducibly produce the cores.
- the outer casing 14 is pressed against the wall 20 by means of a peripheral vacuum network 22 which generates a pressure difference across the casing.
- the wall 20 is porous, microperforated or perforated.
- the shapes and dimensions of the peripheral vacuum network 22 are adjusted by those skilled in the art so as to obtain a satisfactory plating of the outer casing 14 against the wall 20 of the mold.
- the tooling 18 is inclined so as to obtain progressive gravity filling.
- the tool 18 is positioned on a support 24 whose inclination is adjustable, in particular the angle formed by the longitudinal direction 12 and the horizontal direction.
- the support 24 and the tooling 18 are mounted on means 26 for limiting the propagation of vibrations, for example silentblocs.
- the support 24 is not more detailed because it is within the reach of the skilled person.
- At least one vibration source 28 is connected to the support 24 or tool 18. According to the invention, the vibrations are emitted slightly above the filling level during filling. This characteristic makes it possible to optimize the filling.
- a source of vibration 28 is connected to the support 24 and can slide along said support 24 in the longitudinal direction 12, following the level of filling.
- the vibration source 28 is translated so as to remain always slightly above the level of filling.
- several vibration sources 28 are connected to the support 24 and uniformly distributed in the longitudinal direction 12.
- the vibration sources 28 operate by sector, the vibration sources 28 located below the filling level. emitting no more vibrations as the level of filling is raised.
- only the source or sources of vibration 28 located just above the level of filling emits (tent) vibrations, the others being switched on or off as filling.
- the source (s) of vibration emits (tent) vibrations at frequencies between 20 and 150 Hz.
- the frequencies are greater than 50 Hz so as to reduce the impact of vibration on the tooling.
- the vibrations have a frequency of the order of 70 Hz for a filler material in the form of balls 1 mm in diameter asec tooling inclined at 25 ° and 1.7 m in length.
- the vibration characteristics are adjusted according to the tooling, including its length, inclination and filling material to obtain the best filling ratio.
- This filling rate is also a function of the inclination of the tool, the filling rate being even better than the tool is inclined.
- the longer the tooling is inclined the more the filling rate varies from one end to the other of the core because of the pressure due to the column of the filling material and the compression at the bottom of the core.
- outer casing 14 is inclined of the order of 45 ° to obtain a good compromise.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Basic Packing Technique (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0854099A FR2932714B1 (fr) | 2008-06-20 | 2008-06-20 | Procede de realisation d'un noyau comprenant une enveloppe contenant des produits granuleux et/ou pulverulents. |
PCT/FR2009/051152 WO2009153523A2 (fr) | 2008-06-20 | 2009-06-17 | Procede de realisation d'un noyau comprenant une enveloppe contenant des produits granuleux et/ou pulverulents |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2323825A2 true EP2323825A2 (fr) | 2011-05-25 |
EP2323825B1 EP2323825B1 (fr) | 2014-09-24 |
Family
ID=40338440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09766085.6A Active EP2323825B1 (fr) | 2008-06-20 | 2009-06-17 | Procede de realisation d'un noyau comprenant une enveloppe contenant des produits granuleux et/ou pulverulents, dispositif et noyeau obtenu. |
Country Status (4)
Country | Link |
---|---|
US (1) | US8460596B2 (fr) |
EP (1) | EP2323825B1 (fr) |
FR (1) | FR2932714B1 (fr) |
WO (1) | WO2009153523A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3109024B1 (fr) | 2012-06-12 | 2017-11-29 | Mitsubishi Chemical Corporation | Procede de moulage d'articles composites |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3132404A (en) * | 1961-10-30 | 1964-05-12 | Silberkuhl Wilhelm Johannes | Apparatus for producing doubly curved concrete shells |
GB1036596A (en) * | 1962-10-08 | 1966-07-20 | William Antony Wiseman | Improvements in apparatus for gas chromatography |
US4193750A (en) * | 1977-11-28 | 1980-03-18 | Nielson Jay P | Self-propelled slip form machine |
DE2933956A1 (de) * | 1979-08-22 | 1981-03-12 | Helmut 6000 Frankfurt Hoedt | Verfahren und vorrichtung zur herstellung von formkoerpern aus mineralischen bestandteilen und haertbaren organischen bindemitteln. |
US4331857A (en) * | 1980-01-30 | 1982-05-25 | The United States Of America As Represented By The Secretary Of The Navy | Alloy-cored titanium welding wire |
FR2533836B1 (fr) * | 1982-10-05 | 1988-01-22 | Elf Aquitaine | Procede et dispositif de remplissage de colonnes chromatographiques |
FR2576546B1 (fr) | 1985-01-25 | 1987-05-07 | Aerospatiale | Mandrin monobloc, destructible par voie chimique, et procede et dispositif de fabrication d'un tel mandrin |
JPS61202827A (ja) * | 1985-03-05 | 1986-09-08 | Aisin Seiki Co Ltd | 樹脂中空成形品の製造方法 |
CA2088238C (fr) * | 1992-01-30 | 1998-08-18 | Masato Oku | Methode de fabrication de preformes de fibres de verre |
US6589470B2 (en) * | 1999-04-26 | 2003-07-08 | Robert P. Fried | Process for producing molded plastic articles |
US6524421B1 (en) * | 2000-09-22 | 2003-02-25 | Praxair Technology, Inc. | Cold isopressing method |
US7559332B2 (en) * | 2002-07-02 | 2009-07-14 | Toyota Motor Sales U.S.A., Inc. | Media removal apparatus and methods of removing media |
US7217380B2 (en) * | 2002-07-22 | 2007-05-15 | Toyota Motor Sales, Usa, Inc. | Vibration apparatus and methods of vibration |
US7267542B2 (en) * | 2003-11-13 | 2007-09-11 | The Boeing Company | Molding apparatus and method |
DE102005056420B4 (de) * | 2005-11-26 | 2017-12-21 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Herstellung eines Stützkerns für die Herstellung eines faserverstärkten Strukturhohlbauteiles |
DE102006031325B4 (de) * | 2006-07-06 | 2010-07-01 | Airbus Deutschland Gmbh | Verfahren zur Herstellung eines Faserverbundbauteils für die Luft- und Raumfahrt |
-
2008
- 2008-06-20 FR FR0854099A patent/FR2932714B1/fr not_active Expired - Fee Related
-
2009
- 2009-06-17 EP EP09766085.6A patent/EP2323825B1/fr active Active
- 2009-06-17 WO PCT/FR2009/051152 patent/WO2009153523A2/fr active Application Filing
- 2009-06-17 US US13/000,210 patent/US8460596B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009153523A3 * |
Also Published As
Publication number | Publication date |
---|---|
FR2932714B1 (fr) | 2013-05-17 |
US20110226660A1 (en) | 2011-09-22 |
WO2009153523A2 (fr) | 2009-12-23 |
US8460596B2 (en) | 2013-06-11 |
WO2009153523A3 (fr) | 2010-02-25 |
EP2323825B1 (fr) | 2014-09-24 |
FR2932714A1 (fr) | 2009-12-25 |
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